Year	% of merchandise exports
1970	43.685205734048054
1971	43.403672022651264
1972	37.29843320954513
1974	32.026650468235765
1975	33.97964056100184
1976	36.6219912730662
1977	33.38870208190899
1978	33.494655204425136
1979	31.445142662356776
1981	30.14703173752726
1997	24.193455200628787
1998	25.574058437953177
2000	21.15953721695798
2001	20.582963194298387
2002	19.455660927440146
2003	20.303191633238022
2006	18.81330751839949
2007	18.124180244964798
2008	16.89452374189157
2009	20.308416509706454
2010	19.050979794322927
2011	19.187432594550504
2012	18.508506505197943
2013	17.637307853153413
2014	21.433003882754882
2015	21.419869418924907
2016	24.06357502994548
2017	22.71819397166706
2018	22.836976511117978
2019	21.331991239624024
2020	21.451193013981186
2021	21.208804847428237
2022	18.69990292046912